Patent US3905563A successfully refreshed from Google Patents.
Patent US3290251A successfully refreshed from Google Patents.
US3290251A
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Electrostatic latent image developing compositions containing an ether
Assignee: Dennison Manufacturing Co
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Filing: 1963-12-16
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Granted: 1966-12-06
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Expires: 1983-12-16
Abstract
No abstract record available.
Inventors
- 👤 George R Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:36
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/125; G03G9/135
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
FOR DEVELOPING AN ELECTROSTATIC IMAGE, A LIQUID DEVELOPER CONSISTING ESSENTIALLY OF AN INSULATING LIQUID HAVING SUSPENDED THEREIN FINELY-DIVIDED TONER PARTICLES WITH AN AVERAGE SIZE LESS THAN ABOUT 40 MICRONS, SAID DEVELOPER BEING CHARACTERIZED BY HAVING DISSOLVED IN SAID INSULATING LIQUID AS CHARGE MODIFIER AND IN AN AMOUNT SUFFICIENT TO PROVIDE A POSITIVE CHARGE ON SAID TONER PARTICLES AND NOT MORE THAN ABOUT 15% BY WEIGHT OF SAID INSULATING LIQUID, AN ORGANIC ETHER SELECTED FROM THE GROUP CONSISTING OF FURAN, 4 METHYL, 2 VINYL 1,3-DIOXOLANE, AND ETHERS HAVING ONE OF THE FOLLOWING STRUCTURES:
Claim 2
Dependent Claim
92 words
FOR DEVELOPING AN ELECTROSTATIC IMAGE, A LIQUID DEVELOPER CONSISTING ESSENTIALLY OF AN INSULATING LIQUID HAVING SUSPENDED THEREIN FINELY-DIVIDED TONER PARTICLES WITH AN AVERAGE SIZE LESS THAN ABOUT 40 MICRONS, SAID DEVELOPER BEING CHARACTERIZED BY HAVING DISSOLVED IN SAID INSULATING LIQUID AS CHARGE MODIFIER AND IN AN AMOUNT SUFFICIENT TO PROVIDE A POSITIVE CHARGE ON SAID TONER PARTICLES AND NOT MORE THAN ABOUT 15% BY WEIGHT OF SAID INSULATING LIQUID, AN ORGANIC ETHER SELECTED FROM THE GROUP CONSISTING OF FURAN, 4 METHYL, 2 VINYL 1,3-DIOXOLANE, AND ETHERS HAVING ONE OF THE FOLLOWING STRUCTURES:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |